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Nikolas Klauser cbbf303ff5

[libc++] Optimize __hash_table copy constructors and assignment (#151951 )

```
----------------------------------------------------------------------------------------------------------------------
Benchmark                                                                                             old          new
----------------------------------------------------------------------------------------------------------------------
std::unordered_set<int>::ctor(const&)/0                                                           15.4 ns      14.6 ns
std::unordered_set<int>::ctor(const&)/32                                                           686 ns       322 ns
std::unordered_set<int>::ctor(const&)/1024                                                       35839 ns     21490 ns
std::unordered_set<int>::ctor(const&)/8192                                                      385790 ns    280270 ns
std::unordered_set<int>::operator=(const&) (into cleared Container)/0                             15.1 ns      15.9 ns
std::unordered_set<int>::operator=(const&) (into cleared Container)/32                            1077 ns       333 ns
std::unordered_set<int>::operator=(const&) (into cleared Container)/1024                         31296 ns      9984 ns
std::unordered_set<int>::operator=(const&) (into cleared Container)/8192                        266776 ns    109418 ns
std::unordered_set<int>::operator=(const&) (into partially populated Container)/0                 15.1 ns      16.3 ns
std::unordered_set<int>::operator=(const&) (into partially populated Container)/32                 962 ns       320 ns
std::unordered_set<int>::operator=(const&) (into partially populated Container)/1024             31713 ns     10128 ns
std::unordered_set<int>::operator=(const&) (into partially populated Container)/8192            266113 ns    108525 ns
std::unordered_set<int>::operator=(const&) (into populated Container)/0                          0.990 ns      2.03 ns
std::unordered_set<int>::operator=(const&) (into populated Container)/32                           963 ns       263 ns
std::unordered_set<int>::operator=(const&) (into populated Container)/1024                       27600 ns      7793 ns
std::unordered_set<int>::operator=(const&) (into populated Container)/8192                      235295 ns     66248 ns
std::unordered_set<std::string>::ctor(const&)/0                                                   16.0 ns      15.0 ns
std::unordered_set<std::string>::ctor(const&)/32                                                  2950 ns      1277 ns
std::unordered_set<std::string>::ctor(const&)/1024                                              246935 ns     73762 ns
std::unordered_set<std::string>::ctor(const&)/8192                                             3310895 ns   2468608 ns
std::unordered_set<std::string>::operator=(const&) (into cleared Container)/0                     16.1 ns      15.8 ns
std::unordered_set<std::string>::operator=(const&) (into cleared Container)/32                    5856 ns      1039 ns
std::unordered_set<std::string>::operator=(const&) (into cleared Container)/1024                170436 ns     74836 ns
std::unordered_set<std::string>::operator=(const&) (into cleared Container)/8192               1574235 ns   1096891 ns
std::unordered_set<std::string>::operator=(const&) (into partially populated Container)/0         16.0 ns      16.3 ns
std::unordered_set<std::string>::operator=(const&) (into partially populated Container)/32        5571 ns      1064 ns
std::unordered_set<std::string>::operator=(const&) (into partially populated Container)/1024    199220 ns     75462 ns
std::unordered_set<std::string>::operator=(const&) (into partially populated Container)/8192   1552465 ns   1116094 ns
std::unordered_set<std::string>::operator=(const&) (into populated Container)/0                   1.70 ns      2.14 ns
std::unordered_set<std::string>::operator=(const&) (into populated Container)/32                  2562 ns       645 ns
std::unordered_set<std::string>::operator=(const&) (into populated Container)/1024              228608 ns     39100 ns
std::unordered_set<std::string>::operator=(const&) (into populated Container)/8192             2013723 ns    390401 ns
```

Fixes #77657

2025-08-15 08:57:33 +02:00

cmake

[libc++][hardening] Introduce assertion semantics. (#149459 )

2025-07-29 00:19:15 -07:00

docs

[libc++] Optimize __hash_table copy constructors and assignment (#151951 )

2025-08-15 08:57:33 +02:00

include

[libc++] Optimize __hash_table copy constructors and assignment (#151951 )

2025-08-15 08:57:33 +02:00

lib

Revert "[libc++][hardening] Introduce a dylib function to log hardening errors." (#148787 )